Keppler, Joseph Ferdinand, Keppler, Joseph Ferdinand, Keppler & Schwarzmann, and J. Ottmann Lithographic Company. "The woods are full of them." Print. New York: Keppler & Schwarzmann, [1889]. Norman B. Leventhal Map & Education Center, https://collections.leventhalmap.org/search/commonwealth:q524n415j (accessed April 25, 2024).